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# -*- coding: utf-8 -*-
"""Tests for multipart emails."""
from future.tests.base import unittest
import future.backports.email as email
import future.backports.email.mime.multipart
from future.builtins import list
class EmailMultiPartTests(unittest.TestCase):
"""Tests for handling multipart email Messages."""
def test_multipart_serialize_without_boundary(self):
"""Tests that serializing an empty multipart email does not fail."""
multipart_message = email.mime.multipart.MIMEMultipart()
self.assertIsNot(multipart_message.as_string(), None)
def test_multipart_set_boundary_does_not_change_header_type(self):
"""
Tests that Message.set_boundary() does not cause Python2 errors.
In particular, tests that set_boundary does not cause the type of the
message headers list to be changed from the future built-in list.
"""
multipart_message = email.mime.multipart.MIMEMultipart()
headers_type = type(multipart_message._headers)
self.assertEqual(headers_type, type(list()))
boundary = '===============6387699881409002085=='
multipart_message.set_boundary(boundary)
headers_type = type(multipart_message._headers)
self.assertEqual(headers_type, type(list()))
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